Abstract: In order to study in addition to forage sorghum breaking tiller and tiller retention and whether thinning relationship with the production, by using the method Ota randomized comparison group, the study of soil moisture, plant morphological and yield. The results showed that: keep the tiller, not thinning treatment could efficiently utilized rainfall and irrigation, the plants increased significantly, increasing the total number of stems per plant, significantly increased yield, in addition to breaking than the tiller handle thinning yield 12.87%. High-density planting forage sorghum reserved tiller not thinning not only significantly increased production, but also could reduced the loss of human and financial resources in addition to the tiller and breaking thinning caused.